Slump Test – Type of Slump & Test Method

Concrete slump test:

The slump test is conducted to measures the consistency of concrete in that specific batch. Here, consistency of concrete refers to workability or fluidity of freshly made concrete, and therefore it is a measure of the ease with which concrete flows.

Therefore, the slump test is used on-site to measure the workability of concrete or degree of fluidity in the concrete mix. Generally, loose wet mixes are more workable than drier mixes, but concrete of the same consistency may vary in workability.

The test also shows the change of fluidity of mix between two batch mixes. The slump test is widely used in construction to a few apparatus and simple procedure. The slump is also used to ascertain the effects of plasticizers on their introduction in the concrete mix.

Principle:

The Slump test is carried out with the help of a conical cone open at both ends. The slump cone filled with concrete lifted up and the resulting height of concrete spread over surface shows the degree of fluidity, workability, and consistency of the concrete mix. It also indicates the amount of water added is correct or not.